Interview Questions
Practice the exact questions companies are asking right now.
Questions
10.0k
Companies
520
Updated
08.21.2026
10.0k Questions 520 Companies08.21.2026
PLTCHK
"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"
_The_TaNk_
"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"
ChrisSenior SWE, LinkedIn
"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."
sleepy33
"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."
JakeSenior ML Engineer, Lyft
"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."
nuggetlord
"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."
CarlosFull Stack, Shopify
"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."
boba.tea.vibes
"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."
AndySWE-II, Google
"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."
couchpotato99
"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."
ShrutiData Engineer, Salesforce
"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."
midnightramen
"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."
BiancaFrontend Eng, Figma
"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."
tambrahm007
"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."
toa
"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."
Showing 20 results
Role
Easy
Software EngineerNew GradFind the longest palindromic substring
Problem Given a string s, find the longest contiguous substring of s that is a palindrome (reads the same forward and backward). Input - A string s co...
Coding & Algorithms
3
0
40 people solved
Feb 11, 2026
Medium
Software Engineer LockedCompute sums and maximum path in a tree
This question evaluates understanding and implementation of binary tree traversal, recursion, aggregation of node values, and computation of maximum s...
Coding & Algorithms
5
0
76 people solved
Feb 11, 2026
Medium
Software EngineerCompute streaming sliding-window minimums
Problem You are given an integer array nums of length n and an integer window size k. You scan nums from left to right (streaming). At each index i, y...
Coding & Algorithms
13
0
90 people solved
Feb 11, 2026
Hard
Software EngineerImplement 2048 tilt move
Problem: Implement a 2048 “tilt” (move) operation You are given a 4×4 board for the game 2048. Each cell contains either 0 (empty) or a power of two (...
Coding & Algorithms
19
0
239 people solved
Feb 11, 2026
Medium
Software Engineer LockedDecompress encoded string with nested repeats
This question evaluates string parsing and manipulation skills, particularly handling nested repetition encodings and reasoning about output growth, a...
Coding & Algorithms
27
0
198 people solved
Feb 11, 2026
Medium
Software Engineer LockedDesign structure for insert and k-th largest
This question evaluates data-structure design and algorithmic efficiency for dynamic order-statistics over a multiset (duplicates allowed), focusing o...
Coding & Algorithms
12
0
87 people solved
Feb 11, 2026
Medium
Software EngineerDesign a feedback-text personalization data system
System/ML design scenario: personalize using user feedback text You are building an embeddings + personalization pipeline for a consumer product (e.g....
ML System Design
4
0
34 people solved
Feb 11, 2026
Hard
Software Engineer LockedImplement short algorithms on logs, grids, and strings
This multi-part Coding & Algorithms question evaluates algorithmic problem-solving skills and mastery of core competencies including temporal window r...
Coding & Algorithms
18
0
185 people solved
Feb 11, 2026
Easy
Software EngineerIntern LockedSolve array duplicates and two-type subarray
These problems evaluate proficiency with array manipulation, frequency and membership reasoning, and algorithmic analysis of time and space complexity...
Coding & Algorithms
10
0
92 people solved
Feb 11, 2026
Medium
Data ScientistEstimate Greeks and hedging PnL
Consider a vanilla European option under the Black-Scholes framework. 1. Without using a calculator, explain how you would mentally estimate the optio...
Software Engineering Fundamentals
3
0
58 people solved
Dec 8, 2025
Hard
Machine Learning EngineerEvaluate TPR/FPR, sigmoid, and activations
You have a 70-minute assessment with several ML-fundamentals multiple-choice questions. Answer the following (show calculations where applicable). 1) ...
Machine Learning
4
0
69 people solved
Oct 10, 2025
Easy
Data ScientistWrite SQL for top drivers and cancellation rates
Question You work on a rideshare / ride-hailing product that connects drivers and riders, with a focus on airport pickups. Using SQL, answer the quest...
Data Manipulation (SQL/Python)
9
0
127 people solved
Dec 7, 2025
Medium
Machine Learning EngineerML System Design: Thumbnail Selection for a Streaming Catalog
ML System Design: Thumbnail Selection for a Streaming Catalog You work at a video streaming service. For each title in the catalog (movie or show), th...
ML System Design
1
0
22 people solved
Feb 10, 2026
Medium
Machine Learning Engineer LockedMinimize Fence Painting Operations
This question evaluates algorithmic problem-solving and optimization skills, focusing on minimizing painting operations on an array-modeled fence and ...
Coding & Algorithms
4
1
56 people solved
Feb 10, 2026
Medium
Software Engineer LockedSolve substring and access-log problems
This question evaluates proficiency in string algorithms, frequency analysis, and set/hash-based data processing by testing substring transformation u...
Coding & Algorithms
1
0
24 people solved
Feb 10, 2026
Medium
Data ScientistCompute Cohort Retention Rate
You are given two tables: - users(user_id BIGINT, signup_ts TIMESTAMP) — one row per user. - user_activity(user_id BIGINT, activity_ts TIMESTAMP, even...
Data Manipulation (SQL/Python)
9
0
65 people solved
Feb 10, 2026
Easy
Data Scientist LockedDetermine if tree has path sum
This question evaluates understanding of binary tree data structures and traversal techniques, along with the ability to accumulate and track root-to-...
Coding & Algorithms
3
0
24 people solved
Feb 9, 2026
Medium
Data Scientist LockedEvaluate fake accounts and ad creation
This question evaluates a data scientist's competencies in measurement and experimentation, covering prevalence estimation and detection system evalua...
Analytics & Experimentation
2
0
44 people solved
Feb 9, 2026
Medium
Data Scientist LockedEvaluate Notification-Based Account Ranking
This question evaluates a data scientist's competency in causal inference, A/B test and experiment design, metric definition and selection, statistica...
Analytics & Experimentation
3
0
24 people solved
Feb 9, 2026
Medium
Machine Learning EngineerDesign a Real-Time Feature Store
Design a real-time feature store for machine learning systems used in ads or recommendation ranking. Your design should support both: - Online inferen...
ML System Design
4
0
52 people solved
Feb 9, 2026